Process of dyeing.



J. SCHMITZ.

PROCESS OF DYEING.

APPLICATION FILED JUNE 13, 1914.

1,1 00,001{ Patented NOV. 9, 10.5.

2 SHEETSSHEET I.

JOSEPH SCHMITZ, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 UNIFORM DYEING MACHINE 00., OF GROVEVILLE, NEW JERSEY, A CORRORATION OF NEW JERSEY.

PROCESS OF DYEING.

To all whom it may concern:

'Be it known that I, JOSEPH SoHMrrz, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in the Process of Dyeing, of which the following is a specification.

The object of my invention is to dye raw cotton and likematerial as it comes from the bale in such a manner that it will be evenly dyed throughout. This object I attain in the following manner, reference being had to .the accompanying drawings, in which: I

Figure 1 is a perspective view of a bale of cotton, showingv the first step in the process; Fig. 2 is a perspective view of the rolled section of the cotton prior to being placed in the dye vat; Fig. 3 is a sectional plan view on the line aa, Fig. 4, of one form of dye vat showing the rolled sections in position; Fig. 4 is a transverse sectional view on the line bb, of Fig. 3; and Fig. 5 is a detached perspective view of one of the tubes used in the rolls of cotton at the center of the vat. g

It is exceedingly diflicult to properly dy'e raw cotton. The usual practice is to pull the cotton from the bale and to pack it in a vat, generally under pressure, and to subject it to the dye liquor 'while under pres- I sure. The dyeing is not always uniform and a certain percentage of the cotton has to be discarded on that account.

By my invention, I am enabled to evenly dye raw cotton by making it into rolls or bats, packing thecotton in a vat and circulating the dye liquor through the material first in one direction and then in another direction. 'I find that the cotton in a bale 'canbe removed in thin layers and I utilize this knowledge and roll the cotton, one layer after another, as indicated in Fig. 1. of the drawings. When a roll is completed it is in the shape illustrated in Fig. 2. The rolls are placed on end in a vat, as illustrated in Figs. 3 and 4.

The vat has a casing 1 and a transverse partition 2 Which-separates the dyeing chamberBfrom the mixing or circulating chamher 4. Within the dyeing chamber is a perforatedv partition 5, some distance from the bottom, perforated pipe 6 which communicates with Specification of Letters Patent.

and the bottom chamber has a Patented Nov.9, 1915.

Application filed June 13, 1914. Serial No. 844,927.

a circulating pipe 7 connected to any suitable circulating pump.

8 is a circulating pipe communicating with the chamber 4 and with a circulating pump.

Suitable valves may be provided for reversing the circulation so that the dye liquor dicated in Fig. 3. These tubes are prefer-' ably made as shown in Fig. 5, with a vertical slot 10 and a perforated upper end 11. The lower end of "the tube is open to allow the dye liquor to circulate into the tube through its slot and into the roll of cotton.

In order to properly hold the cotton on to the lower perforated partition 5, I provide a perforated partition or cover plate 12' and this is fastened by any suitable means. The tubes 9 are preferably shorter than the rolls so that the cotton will extend over the ends of the tubes, as shown in Fig. 4:, thus preventing the dye liquor from short circuiting. W'hen the perforated plate 12 is in position and firmly secured the dye liquor first passes into the chamber 4 andv then flows over the partition 2, which is lower than the side walls of the vat, then into the dyeing chamber, passing down through the bod of cotton andout through the pipe 7 at t e bottom of the dyeing chamber. After the dye liquor has circulated for a given length of time in this direction, suitable valves are adjusted so as to cause the circulation of the li nor to be reversed so'that the liquor will ow through the pipe 7, dis" tributing pipe 6, up through the perforated partition 5, through the rolls of cotton and through the tubes, and it will flow over the abort partition 2 into the circulating cham- The partition 5 is preferably made in sections andrests on ledges 13 projecting from the sides of the vat and the cover plate 12 is also made in sections and is held in pos1- stance, these bars 15 extend under pins 15 ateach side of the vat, as shown clearly in Figs. 3 and 4.

It will be understood that other types of dyeing apparatus may be used where the liquor is circulated first in "one direction and then in the opposite direction, and my improved process can be carried out in an apparatus 1n WlllCll the circulation is in one d1- a rectlon only. I have found, however, that 1 raw cotton, said process consisting in rolling sections of the cotton into small bats, placing these sections on end in a vat having a perforated bottom and placing a perforated cover over the hats, circulating the dye liquor first in one direction and then in the opposite direction through the rolls I or bats of cotton so as to thoroughly impregnate and evenly dye the said cotton.

3. The process herein described of dyeing raw cotton, said process consisting in rolling cotton into small bats, placing a circulating tube in some of said bats, closely packing the several bats in a dye Vat having a perforated bottom, locating the bats, with the circulating tubes therein, at the center of the vat, and placing a perforated cover over the bats, then allowing the 'dye liquor to circulate vertically through the bats, first in one direction and then in the opposite direction.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

JOSEPH SCHMITZ.

Witnesses v Jos. H. KLEIN, WM. A. BARR. 

